Cheap VS Advanced RTK GPS/GNSS - What Is BEST For Land Surveying?

Summary

In this video, Ray from Benchmark explains the key differences between amateur and professional GPS systems. He covers five crucial aspects: channel count, constellations, GPS engines, radios, and software. Amateur GPS systems are suitable for basic uses, but they fall short in challenging conditions, lack robust functionality, and often come with limited software. On the other hand, professional-grade GPS provides better precision, reliability, and support for complex tasks like surveying and engineering. Ray emphasizes the importance of choosing the right GPS for your needs and invites viewers to reach out for personalized advice.

Takeaways

• 😀 Professional-grade GPS is designed for precision and repeatability, making it essential for tasks requiring high accuracy.
• 😀 Amateur GPS may be suitable for some applications but doesn't offer the same quality or versatility as professional-grade GPS.
• 😀 Channel count is crucial for GPS performance: higher channel counts improve the ability to receive satellite signals in challenging conditions.
• 😀 Amateur GPS typically has fewer than 500 channels, which makes it less reliable in environments with obstacles like trees or buildings.
• 😀 Constellations (satellites) are key to GPS signal reception, and the more satellites in the constellation, the better the signal and accuracy.
• 😀 A GPS engine is the brain of the device, and a better engine leads to more accurate positioning by filtering out bad signals.
• 😀 Professional-grade GPS devices use more advanced engines that can better discard bad data, ensuring higher reliability.
• 😀 Many lower-grade GPS units lack built-in radios, limiting their use to areas with existing networks, while professional GPS offers independent communication via radio.
• 😀 Radios in professional-grade GPS devices allow for reliable communication between base stations and rovers in both urban and rural environments.
• 😀 Amateur GPS often comes with free software, which is fine for basic tasks but insufficient for more demanding professional work like surveying or excavation.
• 😀 High-end software designed for professional tasks typically requires professional-grade GPS due to compatibility with specialized drivers.

Q & A

What is the main difference between amateur and professional GPS?

The main difference lies in the precision, repeatability, and overall quality of the GPS system. Professional GPS systems offer higher accuracy, more reliable signal processing, and robust features suited for demanding tasks like surveying or engineering, while amateur GPS systems are typically more cost-effective but less precise.

Why is channel count important in a GPS system?

Channel count refers to the number of satellite signals a GPS system can receive. A higher channel count means the GPS can track more satellites, improving its ability to function accurately in challenging environments. Amateur GPS systems tend to have fewer channels, making them less reliable in adverse conditions such as under trees or near buildings.

What does 'constellation' mean in the context of GPS?

A constellation is a group of satellites that work together to provide GPS signals. Different constellations are operated by various countries (e.g., GPS by the USA, GLONASS by Russia). Professional GPS systems typically support more constellations, improving signal accuracy and availability.

How does the GPS engine impact performance?

The GPS engine is the 'brain' of the system, processing the satellite signals to calculate your position. A more advanced GPS engine in professional-grade systems can more accurately differentiate between good and bad data, ensuring better reliability and precision.

What are the advantages of professional-grade GPS radios?

Professional GPS systems often include built-in radios, allowing direct communication between a base station and a rover. This enables high-quality data transmission even in remote areas. In contrast, amateur GPS systems might rely on external networks, limiting their usability to urban environments.

Why might an amateur GPS system require an external network?

Amateur GPS systems typically lack built-in radios, so they rely on an external network (such as an NTRIP network) to send data. This limits their usage to areas where these networks are available, usually urban areas, and makes them unsuitable for remote or rural applications.

What are the limitations of the software provided with amateur GPS systems?

Amateur GPS systems typically come with free or basic software, which is fine for simple applications. However, for complex tasks like excavation or surveying, these systems lack the robust features and computational power needed. Professional-grade GPS systems often come with specialized software capable of handling more advanced tasks.

What is a driver, and why is it important for GPS software?

A driver is a software component that allows high-end GPS systems to communicate with specific software applications. Professional-grade GPS systems usually have drivers that are compatible with advanced industry software, ensuring accurate data processing and reliable performance.

Is amateur GPS useful for all types of work?

Amateur GPS can be useful for general, less demanding tasks where high accuracy and precision are not critical. However, for specialized applications like surveying, engineering, or excavation, professional-grade GPS systems are often necessary due to their superior precision and features.

When should I consider upgrading to a professional-grade GPS system?

If any of the five factors discussed (channel count, constellations, engine quality, radios, and software) are critical for your work, then you should consider upgrading to a professional-grade GPS. This is especially important if you are working in challenging environments or require high-precision data for your applications.